19880440

素因数分解:

$2^3\times 5^1\times {\mathrm{497011}}^1$

素因数の和:497022

約数の個数: 16

約数和(自身を含む): 44731080

約数和(自身を除く): 24850640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497011, 994022, 1988044, 2485055, 3976088, 4970110, 9940220, 19880440]

約数ペア:

[(1, 19880440), (2, 9940220), (4, 4970110), (5, 3976088), (8, 2485055), (10, 1988044), (20, 994022), (40, 497011)]